[NTG-context] \registerhyphenationexception not working

Hello Hans, \registerhyphenationexception as described in latest languages-mkiv.pdf and i-context.pdf does nothing, contrary to \startexceptions, which behaves as expected. Here is the minimal example: \mainlanguage[cs] \showmakeup[discretionary] \registerhyphenationexception[cs][cíl-em]% % \startexceptions[cs] % cíl-em % \stopexceptions \startTEXpage cílem \stopTEXpage By the way, what is the reason to print \showlayout on four pages? Regards, Jano